gparlakov

@Injectable()
export class TimeService implements OnDestroy {
  // ... some useful stuff
  ngOnDestroy(): void {    
    // ... some clean up logic
  }
}

gparlakov

@Injectable()
export class TimeService { 
  // ... some useful stuff
  onDestroy(): void {        
    // ... some clean up logic
  }
}

gparlakov

@Injectable()
export class TimeService implements OnDestroy {
  // ... some useful stuff
  ngOnDestroy(): void {    
    // ... some clean up logic
  }
}

gparlakov

h1: {
  color: pink;
}

gparlakov

var injector = {}; //created at app-bootstrap time 
injector["UserProvider"] = new EagerUserService(); // at EagerModule evaluation time
injector["UserProvider"] = new UserService(); // at AppModule evaluation time

gparlakov

var lazyInjector = {}; // provided at lazy-module start
lazyInjector.prototype = injector; // 'inherit' the root injector 
// and then at LazyModule instantiation:
lazyInjector["UserProfile"] = new LazyUserService();

gparlakov

export class AuthService {
  getUser(): Promise<User> {
    // probably make a xhr but we'll just
    return Promise.resolve(User.Empty);
  } 
}

gparlakov

it('should redirect to login if getUser returns the empty user', () => {
    // given
    // setup the empty user
    auth.getUser.and.returnValue(Promise.resolve(User.Empty));
    // when
    comp.login();
    flushMictrotasks(); // forse the promise microtask on the call stack and let it run 
    // then
    expect(router.navigate).toHaveBeenCalledWith('/login');
  });

gparlakov

const source = from([1, 2, 3]);

source.subscribe(x => console.log('observable', x), null, () => console.info("completed"));
// observable 1 
// observable 2
// observable 3
// completed
source.toPromise().then(x => console.log('toPromise', x));
// toPromise 3

gparlakov

 {
   "configurations": [
    {
      "type": "node",
      "request": "launch",
      "name": "Debug Jest for current test file",
      "program": "${workspaceFolder}\\node_modules\\jest\\bin\\jest",
      "//comment": "--runInBand allows the 'debugger' and breakpoints to be hit",
      "//comment1": "--verbosity false due to bug where console.log is not seen on the console",
      "//comment2": "${fileBaseName} will give the filename that is being edited in VS Code",